Harrumph. A standard trunnion slides right into the Coldsteel receiver. I thought I had to narrow the trunnion to make things fit; at least, that's what I've read was necessary for the .062" Chinese receivers.

So, did Coldsteel bend these wrong, or is there a top cover that will fit? For that matter, it's going to need longer axis pins, too.

Is it a bulged receiver blank? The straight trunnion blanks may take standard trunnions without narrowing them. I remember some issue with the FCG pins because if that with some blanks. Do the FCG pins fit across inside the stock? The Chinese receivers are narrower inside. The Bulgarian 1.5mm receivers are too. I have heard some of the straight Cold Steel blanks are wide, even the thin ones may be a bit. Some of them have the FCG pin holes X and Y a bit off too. I do like the Cold Steel bulged RPK/ Yugo blanks though.

No, it takes standard Galil bits. Well, except for the extra threaded hole under the barrel. There are some shallow slots to clear the barrel pins when you drop the receiver in; you can see them in the pictures earlier in the thread.

The flatside Yugo and 1.6mm Chinese receivers were normal width on the outside, to take standard top covers and axis pins. They used narrower trunnions to make everything work.

At least, that's what I remember from the old threads at gunsnet, which have reverted back to the primordial electrons whence they came. I remember pictures of people cutting Romanian trunnions to fit thicker Chinese receivers, anyway.